With its light liquid formula, Nº9 Bond Protector Nourishing Hair Serum nourishes hair to leave it smoother, detangled, and frizz-free. Olaplex No.9 Bond Protector Nourishing Hair Serum is a hair care product that helps to nourish the locks and control tangles and static. Use it to protect hair against heat damage caused by styling. Heat protection is offered by this hair serum up to 450°F (232°C). This product, which is free of silicone, is packed with antioxidants to help protect hair from pollution and fight off free radicals. Better bounce-back curls, satin shine, and style memory are also benefits of using it. Olaplex No.9 Bond Protector Nourishing Hair Serum is perfect for use anytime hair needs extra protection and works well on all hair types and textures.